Uncurling guide for sewing machines



H..HACKLANDER UNCURLING GUIDE FOR SEWING IMG HINES Filed Aug. 4, 1942 Siwa/NATM v Hana Haclilaner and its lower end engages the top of the plate 26 thereby to constantly urge the plate 26 downwardly.

Fig. 4 illustrates a hosiery blank 33 being delivered to the uncurler in the usual manner, and the line 34 represents the normal level of the work. However, as hereinabove noted, it sometimes becomes desirable to increase the bite" of the needle as by raising the normal feed level of the work. To raise the feed level, when using the present device, the operator need only raise the unseamed portion of the hosiery blank 33 and the upward force of the edges of the hosiery blank upon the guide-pin 29 will in turn raise the plate 26 against the action of the spring 3| which latter is weak enough to be overcome by such force. By replacing the spring 3l with other springs having various strengths the operator may adjust the uncurler to suit the various sewing conditions.

Fig. 5 illustrates a portion of a stocking and the heavily shaded section 35 represents the reenforced heel portion and the lightly shaded section 36 represents the normal or thin gauge portion of the stocking. As hereinabove noted the drop-outs occur during the time when the thick section 35 of the stocking passes through the uncurler and it is followed directly by the thin section 36. It will be understood, therefore,

- from the above description, that by using the present uncurler the drop-out may be obviated by merely raising the free or unseamed portions of the work thereby raising the guide-plate 26 and gauge-pin 29 to permit the work to be fed to the feed-cups at a higher level than normal.

Having thus set forth the nature of the invention, what I claim herein is:

1. A fabric uncurling and guiding device for sewing machines, comprising, a central shank, a pair of presser-members cooperating with and secured directly to said central shank, a fabric guiding plate carried by the lower portion of and disposed in substantially the same plane as said central shank, a spring element associated with said guiding plate to spring bias the same away from said central shank, and means to permit a limited amount of relative rectilinear movement between said central shank and said guiding plate.

2. A fabric uncurling and guiding device for sewing machines, comprising, a central shank, a pair of presser-members cooperating with and secured directly to said central shank, a fabric guiding plate carried by the lower portion of and disposed in substantially the same plane as said central shank, gauging means carried by said guiding plate for contacting and gauging the height of a fabric edge, a spring interposed between said guiding plate and said central shank for spring biasing said guiding plate away from said central shank, and means to permit a limited amount of relative movement between said eentral shank and said guiding plate.

3. A fabric uncurling and guiding device for sewing machines, comprising, a central shank, a pair of presser-members pivotally secured directly to said central shank, a fabric guiding plate of which the upper portion is slidingly received within the lower portion of said central shank, a gauge pin carried by and disposed transversely of said guiding plate for contacting and gauging the height of the edges of a fabric, the opposite ends of said guide pin being received by elongated apertures provided in said pressermembers, a spring element associated with said guiding plate to spring bias the same away from said central shank, and means carried by said central shank to limit the sliding movements of said guiding plate relative to said central shank and said presser-members.

4. A fabric uncurling and guiding device for sewing machines, comprising, a central shank, a pair of presser-members pivotally secured directly to said central shank, a fabric guiding plate, the lower portion of said central shank being bifurcated to slidingly receive the top portion of said guiding plate, a spring element associated with said guiding plate to spring bias the same away from said central shank, and means carried by said central shank to limit the sliding movements of said guiding plate relative to said central shank and said presser-members.

5. A fabric uncurling and guiding device for sewing machines, comprising, a central shank, a pair of presser-members carried directly upon said central shank, a fabric guiding plate disposed in substantially the same plane as said central shank, the lower portion of said central shank being bifurcated to slidingly receive the top portion of said guiding plate, at least one pin secured to said central shank and extending through an elongated aperture provided in said guiding plate, a spring element associated with said central shank and engaging said guiding plate so as to spring bias the guiding plate away from said shank, and fabric gauging means carried by said guiding plate.

6. In a fabric uncurling device for sewing machines, a pair of spring-pressed presser-members, fabric uncurling elements carried upon said presser-members, a fabric guiding plate disposed between said presser-members, a gauge pin carried by and disposed transversely of said guiding plate, the opposite ends of said guide pin being received by elongated apertures provided in said presser-members, means upon which said presser-members and said guiding plate are mounted, and means to permit said guiding plate to shift lengthwise of itself and relative to said uncurling elements.

7. A fabric uncurling and guiding device for sewing machines, comprising, a central shank, a presser-member pivotally mounted upon each of the two opposite sides of said central shank, a fabric guiding plate disposed in substantially the same plane as said central shank, the lower portion of said central shank being bifurcated to slidingly receive the top portion of said guiding plate, a pair of spaced pins secured within said central shank and each extending through an elongated aperture provided in said guiding plate, a spring interposed between the top portion of said guiding plate and said central shank so as to spring bias the guiding plate lengthwise of itself and away from said shank, and a gauge pin carried by and disposed transversely of said guiding plate for contacting and gauging the height of a fabric, the opposite ends of said gauge pin being received by elongated apertures provided in said presser-members.

HANS HACKLANDER. 

